ADP1610ARMZ-R7 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADP1610ARMZ-R7 Datasheet PDF : 20 Pages
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APPLICATION CIRCUITS
The circuit in Figure 27 shows the ADP1610 in a step-up confi-
guration that can be used to generate a 10 V regulator with the
following specifications: VIN = 2.5 V to 5.5 V, VOUT = 10 V, and
IOUT ≤ 400 mA.
4.7µH
L
3.3V
ADP1610
D1
10V
6 IN
SW 5
CIN
10µF
ON
3 SD
7 RT
CSS
22nF
8 SS
FB 2
COMP 1
GND
4
R1
71.3kΩ
R2
10kΩ
RCOMP
220kΩ
CCOMP
150pF
COUT
10µF
Figure 27. 3.3 V to 10 V Step-Up Regulator
The output is set to the desired voltage using Equation 1.
To change the compensation network, see Equation 17 and
Equation 18.
DC-TO-DC STEP-UP SWITCHING CONVERTER
WITH TRUE SHUTDOWN
Some battery-powered applications require very low standby
current. The ADP1610 typically consumes 10 nA from the
input, which makes it suitable for these applications. However,
the output is connected to the input through the inductor and
the rectifying diode, allowing load current draw from the input
while shut down. The circuit in Figure 28 enables the ADP1610
to achieve output load disconnect at shutdown. To shut down
the ADP1610 and disconnect the output from the input, drive
the SD pin below 0.4 V.
4.7µH
3.3V Q1 A FDC6331
R3
10kΩ
Q1 B
CIN
10µF
OFF
CSS
22nF
L
ADP1610
6 IN
SW 5
3 SD
7 RT
FB 2
8 SS
COMP 1
GND
4
D1
R1
71.3kΩ
R2
10kΩ
RCOMP
220kΩ
CCOMP
150pF
10V
COUT
10mF
Figure 28. Step-Up Regulator with True Shutdown
ADP1610
TFT LCD BIAS SUPPLY
Figure 29 shows a power supply circuit for TFT LCD module
applications. This circuit has +10 V, −5 V, and +22 V outputs.
The +10 V is generated in the step-up configuration. The −5 V
and +22 V are generated by the charge-pump circuit. During
the step-up operation, the SW node switches between 10 V and
ground (neglecting forward drop of the diode and on resistance
of the switch). When the SW node is high, C5 charges up to 10 V.
C5 holds its charge and forward-biases D8 to charge C6 to −10 V.
The Zener diode (D9) clamps and regulates the output to −5 V.
The VGH output is generated in a similar manner by the charge-
pump capacitors, C1, C2, and C4. The output voltage is tripled
and regulated down to 22 V by the Zener diode, D5.
VGL
–5V
D9
BZT52C5VIS
R4
200Ω
C6
10µF
BAV99 C5
10nF
D8
D7
C4
10nF
D5 C3
D4 10µF
BAV99
D3
R3
200Ω
VGH
22V
D5
BZT52C22
4.7mH
L
C2
1µF
C1
10nF D2
BAV99
3.3V
ADP1610
D1
10V
6 IN
SW 5
CIN
10µF
ON
3 SD
7 RT
FB 2
CSS
22nF
8 SS
COMP 1
GND
4
R1
71.3kW
R2
10kΩ
RCOMP
220kΩ
CCOMP
150pF
COUT
10µF
Figure 29. TFT LCD Bias Supply
Rev. A | Page 15 of 20
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